Full text of “IC Datasheet: 27C EPROM Data Sheet” . several design innovations described in the M27C datasheet to improve programming effi- ciency. 27C Kilobit (64k X 8 Bit) CMOS EPROM. n Fast access time Speed options as fast ns n Low power consumption 20 µA typical CMOS standby current n. datasheet to improve programming efficiency and to provide adequate margin for reliability. Before starting the programming the internal MARGIN MODE circuit.
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27C EPROM Datasheet
The data to be programmed is applied to 8 bits in parallel to the data output pins. These are stress ratings only, and operation of the device at these, or any other conditions out- side those indicated in fatasheet Operating sections of this specification, is not implied. Signal Names 4 Figure datashdet.
Ordering Information Scheme Example: Although only ‘O’s will be programmed, both ‘1 ‘s and ‘O’s can be present in the data word. If the M27C is to be exposed to these types of lighting conditions for extended periods of time, it is suggested that UV EPROM opaque labels be put over the M27C window to prevent unintentional erasure.
Package Mechanical Data 17 Figure To activate the ES mode, the programming equipment must force The associated transient voltage peaks can be suppressed by complying with the two datashewt output control and by properly selected decoupling capacitors.
(PDF) 27C512 Datasheet download
DIP Connections Figure 5. High Speed, see AC Characteristics section for further information. This mode is intended for use by programming equipment to automatically match the device to be programmed with its corresponding programming algorithm. The M27C should be placed within 2. Specifications mentioned in this publication dattasheet subject to change without notice. Search the history of over billion web pages on the Internet.
Full text of “IC Datasheet: 27C EPROM Data Sheet”
The FDIP28W window ceramic frit-seal package has transparent lid which allows the user to ex- pose the chip to ultraviolet light to erase the bit pat- tern. Operating Modes 6 Table 3. The 227c512 required for the address and data in- puts are TTL.
No license is granted by implication or othenwise under any patent or patent rights of STMicroelectronics. A new pattern can then be written to the device by following the programming procedure. Capacitance 10 Table 7. This ensures that all deselect- ed memory devices are in their low power standby mode and that the output pins are only active when data is required from a particular memory device.
Then a sequence of 1 dtaasheet is program pulses are ap- plied to each byte until a correct verify occurs. Program Verify A verify read should be performed on the pro- grammed bits to determine that they were correct ly programmed.
Designers should check that the operating conditions in their circuit match the dattasheet conditions when relying on the quoted parame- ters. For the most efficient use of these two control lines, E should be decoded 275c12 used as the prima- ry device selecting function, while G should be made a common connection to all dagasheet evices in the array and connected to the READ line from the system control bus.
Package Outline 17 Table It should be noted that sunlight and some type of fluorescent lamps have wavelengths in the A range. The recommended erasure procedure for the M27C51 2 is exposure to short wave ultraviolet light which has wavelength A.
27C512 – 27C512 512K EPROM Datasheet
Ice, has three seg- datasheeg that are of interest to the system designer: A single power supply is required in theread mode. Speed obtained with High Speed AC measurement conditions. The two line control function allows: The verify is accomplished with G at V L. LCC Connections 5 Figure 5.
Testing Input Output Waveform 10 Figure 8. The integrated dose i. Exposure to Ab- solute Maximum Rating conditions for extended periods may affect device reliability. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
Vcc must be applied simultaneously with or before Vpp and removed simultaneously or after Vpr. It is recommended that a 0. Program Datsaheet Programming of multiple M27Cs in parallel with different data is also easily accomplished. This publication supersedes and replaces all information previously supplied.